if the car is driven into a van in which there will be a silencer of waves and will be taken to another country?
Moreover, this sheme is not a likely one. In fact, the main problem for car thieves is not the problem with breaking into a car and stealing it, but the problem with moving the car to a quiet place without being noticed. The statistic data proves that in most cases they don't use vans, because if a police officer becomes interested and wants a peek, it's 100% fail for them. And in most countries police pays particular attention to vans, trucks, etc. It's way more likely that thieves just drive the car to a safer place. And in this case it's easy for our search modules to catch signal & track the vehicle.